[CI] SonarCloud integration

Based on gradle/gradle#8881 (comment)

.github/workflows/maven.yml

@@ -39,7 +39,7 @@ jobs:
         uses: gradle/gradle-build-action@v2
         with:
           gradle-version: 7.3
-          arguments: clean test codeCoverageReport --info --continue
+          arguments: clean test --info --continue
 
       - name: Set up JDK 11
         uses: actions/setup-java@v2

build.gradle

@@ -17,10 +17,16 @@ sonarqube {
         property "sonar.sourceEncoding", "UTF-8"
         property "sonar.host.url", "https://sonarcloud.io"
         property "sonar.java.source", "8"
-        property 'sonar.coverage.jacoco.xmlReportPaths', "$projectDir.parentFile.path/build/reports/jacoco/codeCoverageReport/codeCoverageReport.xml"
+        property 'sonar.jacoco.reportPaths', allTestCoverageFile
     }
 }
 
+def allTestCoverageFile = "${rootProject.buildDir}/jacoco/allTestCoverage.exec"
+task jacocoMerge(type: JacocoMerge, group: 'verification') {
+    destinationFile = file(allTestCoverageFile)
+    executionData = project.fileTree(dir: '.', include:'**/build/jacoco/test.exec')
+}
+
 subprojects {
 
     apply plugin: 'java'
@@ -47,7 +53,7 @@ subprojects {
             property "sonar.sourceEncoding", "UTF-8"
             property "sonar.host.url", "https://sonarcloud.io"
             property "sonar.java.source", "8"
-            property 'sonar.coverage.jacoco.xmlReportPaths', "$projectDir.parentFile.path/build/reports/jacoco/codeCoverageReport/codeCoverageReport.xml"
+            property 'sonar.jacoco.reportPaths', allTestCoverageFile
         }
     }
 
@@ -57,53 +63,9 @@ subprojects {
     }
 
     jacoco {
-        toolVersion = "0.8.0"
+        toolVersion = "0.8.3"
     }
-}
 
-// See here for more info: https://docs.gradle.org/6.4-rc-1/samples/sample_jvm_multi_project_with_code_coverage.html
-//
-// tag::coverageTask[]
-// task to gather code coverage from multiple subprojects
-// NOTE: the `JacocoReport` tasks do *not* depend on the `test` task by default. Meaning you have to ensure
-// that `test` (or other tasks generating code coverage) run before generating the report.
-// You can achieve this by calling the `test` lifecycle task manually
-// $ ./gradlew test codeCoverageReport
-tasks.register("codeCoverageReport", JacocoReport) {
-    // If a subproject applies the 'jacoco' plugin, add the result it to the report
-    subprojects { subproject ->
-        subproject.plugins.withType(JacocoPlugin).configureEach {
-            subproject.tasks.matching({ t -> t.extensions.findByType(JacocoTaskExtension) }).configureEach { testTask ->
-                if (subproject.buildFile.exists()) {
-                    //the jacoco extension may be disabled for some projects
-                    if (testTask.extensions.getByType(JacocoTaskExtension).isEnabled()) {
-                        sourceSets subproject.sourceSets.main
-                        executionData(testTask)
-                    } else {
-                        logger.warn('Jacoco extension is disabled for test task \'{}\' in project \'{}\'. this test task will be excluded from jacoco report.', testTask.getName(), subproject.getName())
-                    }
-                }
-            }
+    test.finalizedBy(jacocoMerge)
 
-            // To automatically run `test` every time `./gradlew codeCoverageReport` is called,
-            // you may want to set up a task dependency between them as shown below.
-            // Note that this requires the `test` tasks to be resolved eagerly (see `forEach`) which
-            // may have a negative effect on the configuration time of your build.
-            subproject.tasks.matching({ t -> t.extensions.findByType(JacocoTaskExtension) }).forEach {
-                rootProject.tasks.codeCoverageReport.dependsOn(it)
-            }
-        }
-    }
-
-    // enable the different report types (html, xml, csv)
-    reports {
-        // xml is usually used to integrate code coverage with
-        // other tools like SonarQube, Coveralls or Codecov
-        xml.enabled true
-
-        // HTML reports can be used to see code coverage
-        // without any external tools
-        html.enabled true
-    }
-}
-// end::coverageTask[]
+}